Resistors:

- 1/10 W 5 % SMD 0603 or 0805

Value   Quantity   Reference
220        1       R28
2k2        4       R2, R4, R7, R27
2k2       16       R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20,
                   R21, R22, R23, R24 OPTIONAL (*)
10k        3       R3, R5, R6

* You can use RP1 and RP2 alone

- 1/10 W 5 % SMD 0603 or 0805 or 1206

Value   Quantity   Reference
220k       3       R8, R25, R26

- 1/10 W 1 % SMD 0603 or 0805
  Can be replaced by a through-hole with 200 mils sep.

Value   Quantity   Reference
12k        1       R1

- Resistor pack: 9 pins (8 resistors + common), 100 mils

Value   Quantity   Reference
2k2        2       RP1, RP2 OPTIONAL (*)

* You can use R9-R24 instead.

IMPORTANT! RP1/2 and R9-R24 determine how strong must be the device connected
to channel B. Big values are used for weak devices, but then the maximum
frequency is reduced. Small values allows fast communication, but the target
device must be able to drive this pull-up to near 0 V. The 2k2 value is a good
compromise. The most flexible situation is: R9-R24 aren't solded and you put
a SIL socket in RP1/2 so you can use different packs for different targets.

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Capacitors:

- MLCC (Multilayer Ceramic Capacitors) SMD 0603 or 0805
  Can be replaced by electrolitic capacitors (through-hole w/100 mils sep.)

Value   Quantity   Reference
3.3 uF      1      C11
4.7 uF      2      C7, C15
10 uF       2      C13, C16

- MLCC (Multilayer Ceramic Capacitors) SMD 0603 or 0805

Value   Quantity   Reference
100 nF     15      C1, C2, C3, C4, C5, C6, C8, C9, C12, C14, C19, C20, C21,
                   C22, C23
10 nF       1      C10
27 pF       2      C17, C18

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Diodes

- Zener SMD Melf or SMD SOD-123 or through-hole w/200 mils sep.

Value   Quantity   Reference
3v6         1      D1

- LED SMD 1206 or through-hole w/100 mils sep.

Value   Quantity   Reference
LED         1      D2

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Integrated Circuits

Value       Quantity   Reference    Footprint
LM1117-3.3      1      U3           DPAK2 or SOT-223
FT2232H         1      U2           LQFP-64 (Digi-Key 768-1024-1-ND)
93LC66          1      U4           SOIC-8
IP4220CZ6       1      U1           SOT-457 (Digi-key 568-3529-1-ND) OPTIONAL (*)
LSF0108         2      U5, U6       TSSOP-20 (Digi-key 296-37828-1-ND)

* The IP4220CZ6 is just to protect the circuit

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Miscellaneous

Value         Quantity   Reference
USB               1      J1 (USB type B jack connector for PCB, i.e.
                             Digi-Key 553-2272-ND)
Ferrite Bead      3      L1, L2, L3 (SMD 1206 or 0805 or 0603)
CONN_10X2         2      P1, P2 (dual row, 100 mils, straight, i.e.
                                 Digi-Key 1175-1612-ND)
12 MHz            1      X1, HC-49 crystal (i.e. Digi-Key 300-6027-ND)

